r/HAIBOXING_RC

I keep blowing bearings on my 3100A V2 driveshaft. I've gone to the website, wrong size, I've looked at other brands that I have stolen bearings off of and they are the wrong size online as well. The bearings are very exposed on the rear axle near the drive shaft and I've blown 4 sets and can't find sealed bearings.

Anyone here have thoughts on haiboxing (16889)? Looking to get one as a cheap beater for around $100 to get back into RC and want some input. Thanks